Improvement in japanned furniture-springs



A N0. l22,0 Patened Dec.19, i871.

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Wz'nessas, Wa W74 VX- Ai Y cg/ WW Qmw Y W4 NITED STATES J. JOSEPHEAGLETON, OF NEW YORK, N. Y.; SARAH N. EAGLETON, ADMINIS- TRATRIX,ASSIGNOR TO EAGLETON MANUFACTURING COMPANY, OF SAME PLACE.

IMPROVEMENT IN JAPANNED FURNITURE-SPRINGS.

Specification forming part of Letters Patent No. 122,001, dated December19, 1871.

To all whom it may concern:

Be it known that I, J. J osEPH EAGLETON, of New York, in the county ofNew York and State of New York, have invented anew and usefullmprovement in Furniture-Springs; a-nd I do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable others skilled in the art to make and use the same, referencebeing had to the accompanying drawing ibrming part of thisspecification, iii which the drawing represents a furniture-slidingprovided, according to my improvement, with a japan covering.

The helical springs heretofore employed for furniture-seats, mattresses,&c.,have generally been made of iron wire, brass or copper; but steelvire, although a far superior material for such springs, has not beencommonly employed, owing to the lack of means for protecting suchsprings from corrosion and the lack of means for imparting to them thenecessary stiffness or temper.

rEhe object of this invention is to produce steel tiirnituresprin gsthat shall not only be protected from corrosion, but shall also besuitably tem pered and stiffened.

The drawing is a perspective view of one of my improved springs.

In carrying out my invention I provide a suitable quantity of steel wireof the size of which the spring is to be made, and this I wind uponblocks in the usual'manner, giving the wound spring the ordinarypressing or set. I then provide a suitable bath containing the ordinarypreparation of japan varnish, in which I dip or place the springs so asto cover them with the japan. They are then removed and strung on wiresor put on pegs to drain, after which they are placed in a baking-oven ofthe ordinary kind suitable for the baking of japanned articles, in whichoven the springs are subjected to a temperature sufficient to bake andharden the japan 5 after which the springs are removed from the oven andallowed to cool, when they are ready for use.

The treatment of the springs in this manner imparts to them twoimportant and valuable qualities: First, the springs, when they comefrom the oven and are cooled, have lirmly attached to their exteriorsurface awater-proof covering or coating, which perfectly protects themfrom corrosion and lits them for service in all kinds of climates, hotor cold, dry or damp. Second, the springs thus prepared are strengthenedor stiffened, the application of heat to the springs in the oven havingthe apparent effect to temper the steel of which they are composed,making the springs stronger and more elastic. As between a steel springnot japa-nned as I have described a-nd a steel spring japanned asdescribed, both being of the same size and made from the same piece ofwire, the japanned spring will be found to be much stronger than thespring not japanned. 'Ihe spring not japanned is therefore not onlylacking in strength, but it is also practically useless for want of aprotecting covering. But the improved article produced substantiallyinthe manner I have described forms a strong and durable spring, and noarticle like it has, so far as I am aware, ever been known or used.

While I do not claim, broadly, the making of furniture-springs of steelwire, I wish it to be understood I do not limit or confine myself to theexact order or method of operation here described in producing myimproved springs, as the order or method may be varied wtho ut departingfrom my invention.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The method herein described of strengthening metalsprings.

2. As an improved article of manufacture, a spring made substantially asherein described.

J. J. EAGLE'ION.

Witnesses:

FRANK BLOCKLEY,

ALEX. F. ROBERTS. (62)

